THEORY OF OPERATION - CONTINUED
ELECTRO-HYDRAULIC SYSTEM - CONTINUED
Ride Control Line Relief Valve.
When oil pressure in circuit is less than relief valve setting, force of spring on poppet keeps poppet in con-
tact with seat. No oil is allowed to flow to hydraulic tank.
If there is any outside force on work tool, oil pressure at inlet will increase. If high pressure oil in inlet
exceeds relief valve setting, oil pressure overcomes force of spring. This causes poppet to move off seat.
Oil then flows through passage to hydraulic tank.
Adjustment of ride control line relief valve is made by loosening locking nut. To raise pressure adjustment,
turn adjustment screw clockwise. Turn adjustment screw counterclockwise to lower pressure adjustment.
Ride Control System.
Ride control system provides a means to absorb forces from lift cylinders while machine is traveling. These forces
cause machine to pitch when moving over rough terrain. Main ride control system components are a ride control
valve, accumulator, and lift cylinders.